Combinatorial geometry is concerned with counting objects that arise in geometric Settings.

本文研究组合几何中的一个典型计数问题-整边多边形的计数问题。

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The work, by Professor Brian Butterworth, has shown that dyscalculic children are troubled by even the simplest numerical tasks such as selecting the larger of two numbers or counting the number of objects in a display.

BBC: two dice

She objects to the idea of counting trees which, she says, would give Italy, Spain's main competitor, an unfair advantage.

ECONOMIST: Spain